REG ADD KeyName /v ValueName | /ve /t Type /s Separator /d Data /f KeyName \Machine\]FullKey Machine Name of remote machine ...

REG ADD KeyName [/v ValueName | /ve] [/t Type] [/s Separator] [/d Data] [/f]

  KeyName  [\\Machine\]FullKey
           Machine  Name of remote machine - omitting defaults to the
                    current machine. Only HKLM and HKU are available on remote
                    machines.
           FullKey  ROOTKEY\SubKey
           ROOTKEY  [ HKLM | HKCU | HKCR | HKU | HKCC ]
           SubKey   The full name of a registry key under the selected ROOTKEY.

  /v       The value name, under the selected Key, to add.

  /ve      adds an empty value name (Default) for the key.

  /t       RegKey data types
           [ REG_SZ    | REG_MULTI_SZ | REG_EXPAND_SZ |
             REG_DWORD | REG_QWORD    | REG_BINARY    | REG_NONE ]
           If omitted, REG_SZ is assumed.

  /s       Specify one character that you use as the separator in your data
           string for REG_MULTI_SZ. If omitted, use "\0" as the separator.